<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>test</title>
    <link href="https://cdn.bootcdn.net/ajax/libs/nes.css/2.3.0/css/nes-core.css" rel="stylesheet">
</head>
<body>
<h1>hello</h1>
<!-- mark the entry script with entry attribute -->
<script src="https://unpkg.com/mobx@5.0.3/lib/mobx.umd.js" entry></script>
<script src="https://unpkg.com/react@16.4.2/umd/react.production.min.js"></script>
</body>
</html>